/*
 * Copyright 2009-2009 Tanesha Project. All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification, 
 * are permitted provided that the following conditions are met:
 * 
 *    1. Redistributions of source code must retain the above copyright notice, 
 *    	 this list of conditions and the following disclaimer.
 *    2. Redistributions in binary form must reproduce the above copyright notice,
 *    	 this list of conditions and the following disclaimer in the documentation 
 *    	 and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE FREEBSD PROJECT ``AS IS'' AND ANY EXPRESS OR 
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
 * SHALL THE FREEBSD PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 *  OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 * The views and conclusions contained in the software and documentation are those 
 * of the authors and should not be interpreted as representing official policies, 
 * either expressed or implied, of the Tanesha Project.
 */
package com.google.api.chart;

import java.util.Arrays;

import com.google.api.chart.encoding.JoinHelper;
import com.google.api.chart.encoding.SimpleURLEncoding;

public final class ChartLegendMaker {

	public static ChartLegendMaker legend(String... labels) {
		return new ChartLegendMaker(labels);
	}
	
	private String pos1 = null;
	private String pos2 = "";
	private String[] labels;
	
	private ChartLegendMaker(String... labels) {
		this.labels = JoinHelper.array(JoinHelper.map(Arrays.asList(labels), SimpleURLEncoding.encodeList), String.class);
	}

	public ChartLegendMaker top() {
		this.pos1 = "t";
		return this;
	}
	public ChartLegendMaker bottom() {
		this.pos1 = "b";
		return this;
	}
	public ChartLegendMaker vertical() {
		this.pos2 = "v";
		return this;
	}
	public ChartLegendMaker right() {
		this.pos1 = "r"; this.pos2 = "";
		return this;
	}
	public ChartLegendMaker left() {
		this.pos1 = "l"; this.pos2 = "";
		return this;
	}
	
	@Override
	public String toString() {
		return JoinHelper.join(labels, "|")
			+ (pos1 != null ? "&chdlp=" + pos1 + pos2 : "");
	}
}
